/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 26727
 * Date: 2024-04-27
 * Time: 17:05
 */
public class Computer {
    public void powerOn() {
        System.out.println("打开笔记本电脑");
    }

    public void powerOff() {
        System.out.println("关闭笔记本电脑");
    }

    public void useDevice(USB usb) {
        usb.openDevice();
        //向下转型
        if(usb instanceof Mouse) {
            Mouse mouse = (Mouse)usb;
            mouse.click();
        }else if(usb instanceof KeyBoard) {
            KeyBoard keyBoard = (KeyBoard)usb;
            keyBoard.inPut();
        }
        usb.closeDevice();
    }
}
